PAMAM dendrimer-palladium complex catalyzed synthesis of five-, six- or seven membered ring lactones and lactams by cyclocarbonylation methodology

Hydrogenation of nitrobenzenes catalyzed by platinum nanoparticle core-polyaryl ether trisacetic acid ammonium chloride dendrimer shell nanocomposite

“…The synthesis of organometallic dendrimers, transition-metal, and bimetallic nanoparticles encapsulated inside dendrimers in a variety of architectures as well as their catalytic properties have been reported by Crooks and several other research groups [5][6][7][8][9]. These organometallic dendrimers and dendrimer-encapsulated metal nanoparticles proved to be efficient catalysts for Heck reaction, shape selective epoxidation, alkene oxidation, Kharasch addition reaction, cyclocarbonylation, olefin hydroformation, and asymmetric and symmetric hydrogenations [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Niu et al [10] demonstrated that size-selective hydrogenation of olefins could be achieved by simply changing dendrimers' generation.…”

Palladium(0) Deposited on PAMAM Dendrimers as a Catalyst for C–C Cross Coupling Reactions

“…PAMAM dendrimers have been modified on the peripheries by functionalization, such as double phosphinomethylation of each terminal amine group of G0–G3 on silica support. After coordination of palladium(II), these materials were shown to be active catalysts for cyclocarbonylation of 2-allylphenols, 2-allylaniline, 2-vinylphenol, and 2-vinylaniline with CO/H 2 , affording five-, six- or seven-membered ring lactones and lactams [ 13 ].…”

Palladium-loaded Renewable Polymer as a Green Heterogeneous Catalyst for Cross-coupling Reactions under Microwave Irradiation

“…We also explored the scope of this reaction using aryl chlorides, and found that the conversion of aryl chloride was very good (87%, entry 11). The study of the coupling reaction using 4-methoxyphenylboronic was also carried out, and the corresponding products were produced in excellent yields (entries [13][14][15][16][17][18][19][20][21][22][23][24].…”

“…[11][12][13][14][15] In this context several studies have reported the synthesis of heterogeneous palladium catalysts, e.g., based on palladium-loaded polymers, 16 palladium-loaded inorganic solids, 17,18 and dendrimers. 19,20 In addition, renewable polymers have become a rapidly growing area, as these materials could potentially replace or partially replace environmentally and energy unfavourable petroleumderived polymers. [21][22][23] We recently developed a new class of renewable polymers using gum rosin, [24][25][26] a natural resource abundantly available.…”